Your first response gave you a lot of good info, but I'd like to add a few things. First be sure t use a topstitch needle. Also try to have as flat a surface as possible and also add tables, ironing board or any thing else you can to support your quilt. When a quilt hangs over your work space it causes pull which will affect your tension. I suggest doing a small sandwhich to practice on. The more you practice the better you will do. Good luck!